package com.jerry.project;

import java.io.IOException;
import java.util.List;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.google.appengine.api.datastore.DatastoreService;
import com.google.appengine.api.datastore.DatastoreServiceFactory;
import com.google.appengine.api.datastore.Entity;
import com.google.appengine.api.datastore.FetchOptions;
import com.google.appengine.api.datastore.Key;
import com.google.appengine.api.datastore.KeyFactory;
import com.google.appengine.api.datastore.Query;
import com.google.appengine.api.datastore.Query.CompositeFilterOperator;
import com.google.appengine.api.datastore.Query.Filter;
import com.google.appengine.api.datastore.Query.FilterOperator;
import com.google.appengine.api.users.User;
import com.google.appengine.api.users.UserService;
import com.google.appengine.api.users.UserServiceFactory;
import com.google.appengine.labs.repackaged.org.json.JSONArray;
import com.google.appengine.labs.repackaged.org.json.JSONException;
import com.google.appengine.labs.repackaged.org.json.JSONObject;

public class getTagServlet extends HttpServlet {
	@Override
    public void doPost(HttpServletRequest req, HttpServletResponse resp)
                throws IOException {
		Key tagKey = KeyFactory.createKey("TagKind", "tag");
	    DatastoreService datastore = DatastoreServiceFactory.getDatastoreService();
	    Query query = new Query("Tag", tagKey);
	    List<Entity> tags = datastore.prepare(query).asList(FetchOptions.Builder.withLimit(100));
	    resp.getWriter().write(ToJSON.ListToJSON(tags, "tags"));
	}
}
